Fabian Groffen wrote: > On 14-11-2007 22:56:27 +0100, Martin Kersten wrote: >> Fabian Groffen wrote: >>> On 14-11-2007 22:46:34 +0100, [EMAIL PROTECTED] wrote: >>> >>>> mal> # create schema, if it doesn't exist >>>> mal> catch MALException:str; >>>> mal> >>>> mal> s := bat.new(:void,:oid); >>>> mal> bat.setName(s, "schema"); >>>> mal> bat.setPersistent(s); >>>> mal> >>>> mal> s := bat.new(:void,:void); >>>> >>> The error occurs here. This is a typing issue, but the expert has to >>> give his opinion on it to make it final. ;) >>> >>> You can try (haven't tested it) to first set it to nil, e.g.: >>> s := nil; >>> >> there he is:-) >> >> In MAL arguments and signatures are strongly typed. >> >> s:bat[:void,:oid] := bat.new(_6:void, _6:void) >> >> is type incompatible. >> it should have been >> >> s:bat[:void,:oid] := bat.new(_6:void, _7:oid) > > The observation is that you cannot reuse variables, unless you want to > reuse them for something which has exactly the same type. The > assignment makes that counter intuitive, because it /does/ work when the > variable has never been referenced before. > The orginal example showed that the variable was already declared, i.e. type was frozen. mal> s := bat.new(:void,:oid); mal> bat.setName(s, "schema"); mal> bat.setPersistent(s); mal> mal> s := bat.new(:void,:void); mal> bat.setName(s, "version"); mal> bat.setPersistent(s); mal> > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. > Still grepping through log files to find problems? Stop. > Now Search log events and configuration files using AJAX and a browser. > Download your FREE copy of Splunk now >> http://get.splunk.com/ > _______________________________________________ > Monetdb-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/monetdb-developers
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